<template>
  <div>
    <!-- 面包屑导航区 -->
    <Breadcrumb :List = "list"></Breadcrumb>
    <el-card>
     <el-row :gutter="20">
        <el-col :span = "8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear = "getGoodsList">
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span = "4">
          <el-button type="primary" @click = "addDialogVisible">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- table表格区 -->
      <el-table :data="goodList" stripe border>
        <el-table-column type = "index"></el-table-column>
        <el-table-column prop="goods_name" label="商品名称"></el-table-column>
        <el-table-column prop="goods_price" label="商品价格(元)" width = "90px"></el-table-column>
        <el-table-column prop="goods_weight" label="商品重量" width="70px"></el-table-column>
        <el-table-column label="创建时间" width="140px">
          <template slot-scope="scope">
            {{scope.row.add_time|dataFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="130px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="editGood(scope.row.goods_id)"></el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteGood(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区 -->
      <el-pagination
        background
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[10,20,50,100]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total">
      </el-pagination>
    </el-card>
    <!-- 修改商品信息对话框 -->
    <el-dialog title="修改商品信息" :visible.sync="editDialogVisible" width="30%" @close = "editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
        <el-form-item label="商品名称">
          <el-input v-model="editForm.goods_name" :disabled = "true"></el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price">
          <el-input v-model="editForm.goods_price"></el-input>
        </el-form-item>
        <el-form-item label="商品数量" prop="goods_number">
          <el-input v-model="editForm.goods_number"></el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
          <el-input v-model="editForm.goods_weight"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveEdit">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import Breadcrumb from '../Breadcrumb.vue'
export default {
  components: { Breadcrumb },
  data () {
    return {
      list: ['商品管理', '商品列表'],
      // 商品总数
      total: 0,
      // 商品列表
      goodList: [],
      editDialogVisible: false,
      editForm: {},
      // 查询参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      editFormRules: {
        goods_price: [
          {
            required: true,
            message: '请输入商品的价格',
            trigger: 'blur'
          }
        ],
        goods_weight: [
          {
            required: true,
            message: '请输入商品的重量',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  created () {
    this.getGoodsList()
  },
  methods: {
    // 根据分页查询对应的商品列表
    async getGoodsList () {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败')
      }
      this.goodList = res.data.goods
      this.total = res.data.total
    },
    // 删除商品
    async deleteGood (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.inf0('已取消删除')
      }
      const { data: res } = await this.$http.delete('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除商品失败！')
      }
      this.$message.success('删除商品成功！')
      this.getGoodsList()
    },
    // 根据id获取相应的商品信息
    async editGood (id) {
      const { data: res } = await this.$http.get('goods/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询该商品失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 修改商品信息
    async saveEdit () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.put(`goods/${this.editForm.goods_id}`, this.editForm)
        if (res.meta.status !== 200) {
          return this.$message.error('修改商品信息失败')
        }
        this.$message.success('修改商品信息成功')
        this.editDialogVisible = false
        this.getGoodsList()
      })
    },
    // 编程路由跳转到添加组件
    addDialogVisible () {
      this.$router.push('/goods/add')
    },
    // 分页大小发生变化
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 页码值发生变化
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 修改表单关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    }
  }
}
</script>

<style scoped>

</style>
